Checkered rings are always at the end of every level. They are sometimes hidden and the player may have to do difficult tasks to get to them. Once the orange fish goes through one, the level will be complete.

Rings are first encountered on level 5 of Little Fins. Rings change colour and turn yellow when the orange fish goes through one. The player must make all rings close to each other yellow so that the magic gate will open. Sometimes rings are hidden.